Casing for portable viewer



FIG. 1 is a front perspective view of a casing for portable viewer embodying my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a side elevational view thereof, the elevational view of the other side of the apparatus being similar thereto; and

FIG. 7 is a bottom plan view thereof. 

The ornamental design for a casing for portable viewer, substantially as shown and described. 